Gas burner



Feb. 16, 1943 M. RABlNowlc'z GASl BURNER.

Filed 0pt'. 11, 193@ Patented Feb. 16, 1943 GAs BURNER MechelRabinowi'ez,` London, England, assignor of one-halfto Israel XyelKestenbaum, London,

England AApplicants october 11, 1938,'se1fia1N0. r224,499 In GreatBritain October 1.6, 1937 4 Claims.

-This invention relates to gas burners and more particularly to gasburners provided with ignition means.

"It i's known to provide boiling rings or like burners for gas cookerswith igniting means for the gas issuing from the burners, but suchigniting means are liable to become fouled and put out of 'action in theevent of a pot boiling over which is being heated by the burner. As' itis frequently intended that such igniting means should serve to relightthe burner in the event of its becoming accidently extinguished, it isnecessary to protect the igniting means `by housing the same within aprotective casing. If the igniting means are housed within a protectivecasing mounted on the mixing tube of the burner, the structure of theburner is complicated and the cost of manufacture is excessive,especially when a number of burners are provided, asin thecase of a gascooker.

One object of the present invention is to provide a gas burnerarrangement in which standard types of .boiling rings `and other burnerscan be vemployed without being encumbered with igniting means for theburners, and in which each burner is provided with lighting means,including a pilot jet which is in action all the time gas is beingsupplied to the burner, so as to relight the latter in the event of itsbecoming accidentally extinguished, but which can be turned off, withoutinterfering with thepilot jet of-any other burner which may be in use,when the gas supply to the associated burner is shut off, therebyavoiding waste of gas.

Another object of the invention is to enable the -length of the pilotname to 4be maintained to the extent necessar-y to permit the pilotflame to relight the burner, even when the latter is operating with areduced gas supply.

lA'further object of the invention is to provide means for shutting oiTthe gas supply to the burner and to the pilot jet in the event of thepilot flame becoming accidentally extinguished.

The invention is illustrated diagrammatically by way of example in thedrawing annexed hereto.

Fig. 1 is a plan view of the arrangement in its simplest form,comprisinga pair of gas burners,

Fig. 2 is plan view, and Fig. 3 a corresponding front view of a detail,Fig. 4 is a vertical section througha further detail, Yand Figs. 5-and`6 are -horizontal sections on the linesS--Sand'B-- of Fig. 4.

Referring to Fig. l, the main burners a, l)

are each-provided with a pilot burner e, f, respectively,and aresuppliedvwith gas under the control of manually actuated gas taps c, d,one for each main burner, said pilot burners being arranged in proximityto oneanother toiform a unit separate from the main burners and beingdirected so as to `project igniting flames towards the'main burners a,b. The pilot burners e', f are supported on a-platform q which is xed toa bar p extending between the burners a, b and is supported at its endson the gas cooker in any convenient manner. Gas is supplied to the pilotburners by means of separate pipes e1 and f1 connected up tothe-respective gas taps c, d and extending for apart of their lengthalong the bar fp. Y

Since thepilot burners are arranged at a distance from the main burners,provision must be made for enablingthe pilot names to be maintained attheir maximumlength so as to be able to relight the associated mainburners in the event `of 'the latter being extinguished, irrespectivelywhether, the gas taps of thevmain burners are in the full open positionor turned down. For this purpose, each gas ltap is provided with aseparate conduit, comprising a 4circun-iferential groove y, as shown inFigs. 4 and 6, of such a ylength lthat a full supply of gas is admittedto the pilot burner, notwithstanding the position of the tap, as long asany Ygas is being supplied through the tap to the main burner. f

The pilot burners are provided with individual vlighting devices,comprising friction wheels g r0- tatably mounted on the platform q inproximity to the respective pilot burners and provided with lcrank armsmwhich are connected'by means of rods o to crank arms fixed to the gastaps, so that when the gas taps are turned, the rods o. arereciprocated-and turn the friction Wheels, which 1have a roughened-surfaceco-operating'with ints h mounted in sockets z', therebyproducing sparks for-lighting the gas issuing from the pilot burnerse,f. In yorder to facilitate the renewal of the flints, the socketsz'are provided with bores open at both ends and -the flints are pressedagainst theabrasive surfaces'of lthe friction wheels by means 'ofsprings vk: bearing against abutments l `on the platform'and acting onlevers ihaving vpropections Which take into Athe bores -in vthe socketsi and bear against the ends of the 'intsr therein; the Vlevers g' can beraisedsuiciently to vallow the -ilints 'to vbe insertedA in the bores inlthe 4sockets It desirable to providemeans for shutting i the *gassupply tothe individual pilot burners and theirassociated main burners'in the vevent of the pilot flames becoming accidentally extinguished.For this purpose, the movement of the gas tap into the open position isopposed by a coil spring one end of which is fixed to the platform q andthe other end to the lever m, in such a manner as to turn it and urgethe gas tap through the rod o and the lever n into the closed position.The gas tap is maintained in the open position by means of a catchcomprising a lever s pivoted at t on the platform q and provided with atooth s2, said lever being under the control of a thermostat deviceheated by the pilot flame, which maintains the catch in action duringthe time the pilot flame is alight and prevents the spring a: fromturning the lever m.

The thermostat device comprises a bimetallic strip in the form of a coilr xed'atone end on a bracket r1 mounted on the platform q,-the said coilhaving an arm r2 which engages a notch in the end of the lever s. Whenthe thermostat coil r is heated by the flame of the pilot burner v, thearm moves clockwise and urges the lever s towards a retaining elementconsisting of a disc s1 which is rigid with the lever m until the tooths2 engages a notch in the periphery of said disc, so as to hold thelever m in the position corresponding to the open position of the gastap. On the coil r cooling owing to the pilot iiame being extinguished,the arm r2 turns counter-clockwise and releases the tooth s2 from thenotch in the periphery of the disc s1, thereby allowing the spring :c toturn the lever m and move the gas tap into the closed position. Theadvantage of a bimetallic strip in the form of a coil is that it ispossible to obtain a considerable angular displacement of the free endof the coil, avoiding the necessity of multiplying gear and enabling thefree end of the coil in the form of an arm r2 to engage the lever sdirectly.

In order to enable the gas supply to the main burner to be reduced orthe gas tap c to be turned by hand into the closed position withoutinterfering with the thermostat device and the parts cooperatingtherewith, by means of the handle c1, the lever n is loosely rotatablewith respect to the plug of the tap c and operates it through a lostmotion device, comprising a dog or the like z on the lever which engagesa corresponding dog el on the plug, the arrangement being such that thetap can be turned through 90 relatively to the lever n by means of thehandle c1. By this means the plug can be turned into the open positionby hand and, after the tooth s2 has moved into engagement with the notchin the periphery of the disc s1, the plug can Abe turned by means of thehandle c1 into the partly or fully closed position without turning thelever n.

If the pilot burner name is allowed to play continuously upon the coilv', there is the danger of the bimetallic strip becoming Vpermanentlystretched or damaged, and in order to prevent this, means are providedfor directing the pilot flame away from the coil after the catch hascome into action, for instance towards a member in conductiverelationship with the coil. As shown in Figs. V2 and 3, the pilot burnerv is pivoted at w on the platform q, a pin u provided on the tail'of thelever s bearing against the side of the burner v so that in thepositionshown, the pilot flame is directed'away from the coil r towardsthe bracket r1. On the lever s being moved to withdraw the tooth s2 fromthe notch in the disc'sl, the pin u allows the burner U to move intoa'position in which itv can direct the pilot flame against the coil 1 onthe pilot burner being relighted. The

burner o may be moved into this position by means of a spring (notshown) or the pin may engage a slotted lug rigid with the burner v. Theburner o forms a mixing tube, the gas being supplied thereto by means ofa fixed tube v1.

The supporting platform q, together With the igniting devices thereoncomprising the friction wheels g, the sockets i housing the flints andthe springs k and levers y' forms a unit independent of the main gasburners a, Z1I and can be removed from the bar p without interferingwith the said burners. The operating rods o may also be removed with theplatform q after being released from the levers n. The various elementsof the thermostat control device shown in Figs. 2 and 3 being alsomounted on the platform q can also be removed therewith as a unitwithout interfering with the burners a, 1J.

I claim:

l. A gas burner arrangement comprising in combination a plurality ofmain burners, pilot burners, one for each main burner, arranged inproximity to one another to form a unit separate from the main burnersand directed so as to project igniting flames towards the associatedmain burners, manually actuated taps, one for each main b-urner, forcontrolling the gas supply to each burner independently, agas supplypipe for each pilot burner connected up to the tap of the associatedmain burner, said tap including a rotatable plug portion having aseparate groove for controlling the gas supply to the pilot burnercapable of admitting a full supply of gas to the pilot burner tomaintain the pilot flame at its maximum length at any degree of openingof the tap, and individual lighting devices for said pilot burnerslocated in proximity thereto and operatively connected to the gas tapsfor igniting the gas issuing from the pilot burners on the respectivegas taps being actuated.

2. A gas burner arrangement, comprising in combination a plurality ofmain burners, pilot burners, one for each main burner, arranged inproximity to one another and directed so as to project igniting flamestowards the associated main burners, supporting means for said pilotburners, manually actuated taps, one for each main burner, forcontrolling the gas supply to each burner individually, a gas supplypipe for each pilot burner connected up to the tap of the associatedmain burner, said tap including a rotatable plug portion having aseparate groove vfor controlling the gas supply to thepilot burner andcapable of admitting a full supply of gas to the pilotrburner tomaintain the pilot ame at its maximum length at any degree of opening ofthe tap, individual igniting devices for said pilot burners mounted onsaid supporting means, said supporting means together with the ignitingdevices thereon forming a unit independent of the main gas burners andcapable of removal without interfering with the main burners, and actuating means for the ignition devices operativeiy connected to theindividual ignition devices and the respective gas taps for actuatingthe ignition devices on the gas taps being turned on.

3; A gas burner arrangement, comprising in combination, a plurality ofmain burners, a supporting platform arranged between and sepa-rate fromsaid main burners, pilot burners, onel for each main burner, arranged inproximity to one another above said supporting platform and directed soas to project igniting flames towards the associated main burners,manually actuated taps, one for each main burner, for controlling thegas supply to each burner independently, a gas supply conduit for eachpilot burner connected up to the tap of the associated main burner,ignition devices mounted on said platform, one for each pilot burner,including a rotary friction Wheel arranged in proximity to each pilotburner and a spark producing element arranged to co-operate With saidfriction Wheel, actuating means for said friction Wheels operativelyconnected to the respective gas taps so as t turn in unison with thetaps, a closing spring operatively connected to each of the gas taps andarranged to urge the tap into the closed position, thermostat devicesarranged on the platform in the heating zones of the respective pilotburners, retaining elements fast with the friction wheels and movablecatch elements on the platform operatively connected to the respectivethermostat devices and arranged to engage said retaining elements in theposition thereof corresponding to the full open position of theassociated gas taps, so as to maintain the taps in said full openposition against the action of the closing springs, said platform,together with the elements mounted thereon being removable Withoutinterfering with the main burners.

4. A gas burner arrangement, comprising in combination, a plurality ofmain burners, a supporting platform arranged between and separate fromsaid main burners, pilot burners, one for each main burner, arranged inproximity to one another above said supporting platform and direoted soas to project igniting flames towards the associated main burners,manuall3r actuated taps, one for each main burner, for controlling thegas supply to each burner independently, a gas supply conduit for eachpilot burner connected up to the tap of the associated main burner,ignition devices mounted on said platform, one for each pilot burner,including a rotary friction Wheel arranged in proximity to each pilotburner and a spark producing element arranged to cooperate With saidfriction Wheel, actuating means connected to the friction Wheels and therespevtive gas taps to enable the taps and their associated frictionWheels to be turned in unison, coil springs having one end fixed to theplatform and the other end connected to the respective friction Wheelsso as to turn the latter to urge the associated gas tap into the closedposition, a plurality of thermostat devices arranged on the platform inthe heating zones of the respective pilot burners, each of said frictionWheels having a retaining member with a notch therein, and a movablecatch member on the platform operatively connected to each of saidthermostat devices and arranged t0 co-operate with said notch in theposition of the friction wheel corresponding to the full open positionof the respective gas tap, so as to maintain the gas tap in the fullopen position against the action of said coil spring, said platform,together With the elements mounted thereon, being removable Withoutinterfering with the main burner.

MECHEL RABINOWICZ.

